Report a bug If you spot a problem with this page, click here to create a Bugzilla issue.
Improve this page Quickly fork, edit online, and submit a pull request for this page.
Requires a signed-in GitHub account. This works well for small changes.
If you'd like to make larger changes you may want to consider using
local clone.

core.checkedint

Integral arithmetic operators operate on fixed width types.
Results that are not representable in those fixed widths are silently
truncated to fit.
This module offers integral arithmetic primitives that produce the
same results, but set an 'overflow' flag when such truncation occurs.
The setting is sticky, meaning that numerous operations can be cascaded
and then the flag need only be checked at the end.
Whether the operation is signed or unsigned is indicated by an 's' or 'u'
suffix, respectively. While this could be achieved without such suffixes by
using overloading on the signedness of the types, the suffix makes it clear
which is happening without needing to examine the types.

While the generic versions of these functions are computationally expensive
relative to the cost of the operation itself, compiler implementations are free
to recognize them and generate equivalent and faster code.